Filtering device for nuclear island dewatering
By designing a filter device for hydrophobicity in nuclear islands, the structure of multiple communication holes and filter holes is used to solve the problem of poor drainage caused by the insufficiency of multiple hoses, and the preliminary filtration of the fluid is achieved, ensuring the smoothness of hydrophobicity and filtration efficiency.
Patent Information
- Application Number
- CN202421788007.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-26
AI Technical Summary
During the nuclear island drainage process of nuclear power plants, multiple hoses are inserted into a floor drain at the same time, resulting in poor insertion of the hose, resulting in poor drainage and slow drainage.
A filter device for hydrophobic nuclear islands is designed, the device including an outer cylinder, an inner cylinder and a filter assembly. The top plate of the inner cylinder body has a plurality of communication holes for connecting multiple hydrophobic hoses, and filtering the fluid through the filter holes, flowing to the water outlet, and finally flowing from the water outlet to the floor drain.
This device can avoid the problems of poor insertion and drainage caused by the simultaneous insertion of multiple hoses into the floor drain, ensure smooth water dissipation, reduce radioactive wastewater pollution, and avoid blockage of downstream filters through preliminary filtration.
Smart Images
Figure CN222918272U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of equipment maintenance in nuclear power plants, and particularly relates to a filtering device for nuclear island drainage. Background Art
[0002] During the outage of nuclear power plant units, in order to carry out preventive maintenance and corrective maintenance, operating personnel need to drain water and exhaust air from the system pipelines to ensure the safety of maintenance personnel. The drainage and exhaust pipelines of the pipelines in the AP1000 (Advanced Passive PWR) containment are arranged in a complex manner. Pipe caps are installed on the pipelines behind the drain valves and exhaust valves. In the design, the floor drain is not directly introduced. It is necessary to remove the pipe caps of the drain valves and exhaust valves, connect a hose to the pipeline, and introduce the hose into the floor drain to achieve the drainage function.
[0003] In the prior art, the connection method between the hose and the floor drain is simply to insert the hose into the floor drain. The number of floor drains in the containment is limited, and it often happens that multiple hoses are inserted into one floor drain at the same time. The hoses are squeezed against each other, and it often happens that the hoses are not inserted firmly, resulting in poor drainage and slow drainage speed. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a filtering device for nuclear island drainage to solve the problems that multiple hoses are inserted into one floor drain at the same time, resulting in the hoses not being inserted firmly, poor drainage and slow drainage speed.
[0005] To solve the above problems, the utility model provides a filtering device for nuclear island drainage, which includes: an outer cylinder body having an opening, a receiving cavity and a water outlet that are sequentially communicated, and the water outlet is used to communicate with a floor drain; an inner cylinder body including an inner sleeve and a top plate that are connected to each other, the inner sleeve is inserted into the receiving cavity from the opening, the top plate can block the opening, the inner sleeve has filter holes communicated with the receiving cavity, the top plate has a plurality of communication holes all communicated with the filter holes, and the communication holes are used to communicate with a drain hose; a filtering component wrapped on the outer wall of the inner sleeve and covering the filter holes, and the filtering component is used to filter the fluid flowing from the filter holes to the water outlet.
[0006] As an optional technical solution of the filtering device for nuclear island drainage, a plurality of the communication holes are distributed at intervals along the circumferential direction of the inner sleeve.
[0007] As an optional technical solution of the filtering device for nuclear island drainage, the diameter of the communication hole is 35 mm - 45 mm.
[0008] As an alternative technical solution for the filtering device of the nuclear island drain water, there are a plurality of filtering holes, and the plurality of filtering holes are circumferentially spaced along the inner sleeve, and the plurality of filtering holes are all communicated with the accommodating cavity.
[0009] As an alternative technical solution for the filtering device of the nuclear island drain water, the filtering holes extend along the axial direction of the inner sleeve, and the shape of the filtering holes is oval or regular polygon.
[0010] As an alternative technical solution for the filtering device of the nuclear island drain water, the filtering component includes a mesh cloth, and the filtering device for the nuclear island drain water further includes a pressing plate. The mesh cloth wraps the outer wall of the inner sleeve, and the pressing plate is connected to the outer wall of the inner sleeve to fix the mesh cloth. The mesh cloth is used for filtering the fluid flowing out from the filtering holes.
[0011] As an alternative technical solution for the filtering device of the nuclear island drain water, the filtering component further includes filter cotton, and the filtering device for the nuclear island drain water further includes a cable tie. The filter cotton is wrapped outside the mesh cloth and fixed on the mesh cloth by the cable tie. The filter cotton is used for filtering the fluid flowing out from the mesh cloth.
[0012] As an alternative technical solution for the filtering device of the nuclear island drain water, the inner cylinder further includes a handle provided on the top plate.
[0013] As an alternative technical solution for the filtering device of the nuclear island drain water, the outer cylinder includes an outer sleeve, a first lifting beam, a second lifting beam and a water outlet pipe. The first lifting beam and the second lifting beam are respectively arranged on both sides of the outer wall of the outer sleeve. The water outlet pipe is arranged at the bottom of the outer sleeve and is communicated with the accommodating cavity. The water outlet pipe has the water outlet, and the top of the outer sleeve has the opening.
[0014] As an alternative technical solution for the filtering device of the nuclear island drain water, the materials of the outer cylinder and the inner cylinder are both stainless steel.
[0015] The beneficial effects of the present utility model are:
[0016] The utility model provides a filtering device for nuclear island drainage, which comprises an outer cylinder, an inner cylinder and a filtering assembly. The inner cylinder comprises an inner sleeve and a top plate connected to each other. Since the top plate has a plurality of connecting holes, a plurality of drain hoses can be inserted into the corresponding plurality of connecting holes, and then the fluid flowing in from the connecting holes is filtered through the filtering holes, flows to the water outlet, and finally flows from the water outlet to the floor drain. This arrangement can avoid the problem in the prior art that a plurality of drain hoses are inserted into the floor drain at the same time, causing the drain hoses to be inserted loosely and thrown out of the floor drain, resulting in radioactive wastewater contaminating the ground; at the same time, the filtering assembly is wrapped on the outer wall of the inner sleeve and covers the filtering holes, so that the fluid flowing from the filtering holes to the water outlet can be initially filtered, avoiding the frequent blockage of the filter of the downstream wastewater treatment system. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the structure of a filtering device for nuclear island water drainage in an embodiment of the utility model;
[0018] Figure 2 An exploded view of a partial structure of a filtering device for nuclear island drainage in an embodiment of the utility model;
[0019] Figure 3 This is a schematic diagram of the structure of the inner cylinder in the embodiment of the utility model;
[0020] Figure 4 It is a schematic structural diagram of the outer cylinder in the embodiment of the utility model.
[0021] In the figure:
[0022] 1. outer cylinder; 11. opening; 13. water outlet; 14. outer sleeve; 15. first handle; 16. second handle; 17. water outlet pipe;
[0023] 2. Inner cylinder; 21. Inner sleeve; 211. Filter hole; 22. Top plate; 221. Communication hole; 23. Handle;
[0024] 3. Filter assembly; 31. Mesh cloth; 32. Filter cotton. DETAILED DESCRIPTION
[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.
[0027] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0028] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and cannot be construed as a limitation to the present utility model.
[0029] Such as Figures 1 to 4As shown in the figure, this embodiment provides a filtering device for nuclear island hydrophobic drainage. The filtering device for nuclear island hydrophobic drainage includes an outer cylinder 1, an inner cylinder 2, and a filtering component 3. Among them, the outer cylinder 1 has an opening 11, a receiving cavity, and a water outlet 13 that are connected in sequence. The water outlet 13 can be connected to a floor drain. The inner cylinder 2 includes an inner sleeve 21 and a top plate 22 that are connected to each other. Since the top plate 22 has a plurality of communication holes 221, multiple hydrophobic hoses can be inserted into the corresponding plurality of communication holes 221. Subsequently, the fluid flowing in from the communication holes 221 is filtered through the filter holes 211, flows towards the water outlet 13, and finally flows from the water outlet 13 to the floor drain. This setting method can avoid the problem in the prior art that when multiple hydrophobic hoses are inserted into the floor drain at the same time, the hydrophobic hoses are not firmly inserted and are thrown out of the floor drain, resulting in radioactive wastewater polluting the ground. At the same time, the filtering component 3 is wrapped around the outer wall of the inner sleeve 21 and covers the filter holes 211, so as to initially filter the fluid flowing from the filter holes 211 to the water outlet 13 and avoid the frequent blockage of the filter in the downstream wastewater treatment system.
[0030] Among them, the height of the inner sleeve 21 is 460 mm - 480 mm, and the diameter is 430 mm - 450 mm. It can be selected according to the actual on-site requirements for the height and diameter of the inner sleeve 21. Specifically, the height of the inner sleeve 21 can be selected as 460 mm, 465 mm, 470 mm, 475 mm, or 480 mm, etc.; the diameter of the inner sleeve 21 can be selected as 430 mm, 435 mm, 440 mm, 445 mm, or 450 mm, etc.
[0031] In this embodiment, the top plate 22 can block the opening 11. Among them, the diameter of the top plate 22 is 15 mm - 25 mm larger than the diameter of the opening 11. This setting can completely block the opening 11, and the diameter of the top plate 22 can be selected according to the actual situation.
[0032] Optionally, the height of the outer cylinder 1 is 490 mm - 510 mm, and the diameter of the opening 11 is 470 mm - 490 mm. The height of the outer cylinder 1 and the diameter of the opening 11 can be adjusted according to actual requirements. Specifically, the height of the outer cylinder 1 can be selected as 490 mm, 495 mm, 500 mm, 505 mm, or 510 mm, etc.; the diameter of the opening 11 can be selected as 470 mm, 475 mm, 480 mm, 485 mm, or 490 mm, etc.
[0033] As Figure 3 shown, in this embodiment, a plurality of communication holes 221 can be circumferentially spaced on the top plate 22 along the inner sleeve 21. This arrangement method can arrange more communication holes 221. In this solution, the number of communication holes 221 is 8.
[0034] Specifically, the diameter of the connecting hole 221 can be set to 35mm-45mm. In actual use, the diameter of the connecting hole 221 can be selected according to the actual size of the drain hose. Specifically, the diameter of the connecting hole 221 can be selected to be 35mm, 38mm, 40mm, 42mm or 45mm.
[0035] In this embodiment, there are multiple filter holes 211, which are spaced apart along the circumference of the inner sleeve 21, and all of the filter holes 211 are connected to the accommodating cavity. This arrangement enables the fluid to smoothly enter the accommodating cavity from the filter holes 211.
[0036] Furthermore, the filter hole 211 extends along the axial direction of the inner sleeve 21, which can greatly increase the size of the filter hole 211. The shape of the filter hole 211 can be set to be an ellipse or a regular polygon.
[0037] Specifically, Figure 2 As shown, the filter assembly 3 includes a mesh 31, and the filtering device for nuclear island hydrophobicity also includes a pressing plate. The mesh 31 wraps the outer wall of the inner sleeve 21. The pressing plate and the outer wall of the inner sleeve 21 are connected to fix the mesh 31. By setting the mesh 31, the fluid flowing out of the filter hole 211 can be filtered, thereby avoiding clogging of the water outlet 13. Among them, the outer wall of the pressing plate and the inner sleeve 21 are welded. The mesh 31 is made of stainless steel, which has the advantages of corrosion resistance and high strength. And the outer wall of the inner sleeve 21 is wrapped with a double layer of 50 mesh mesh 31, which can further improve the filtering effect.
[0038] Furthermore, the filter assembly 3 also includes filter cotton 32, and the filter device for nuclear island water drainage also includes a cable tie. The filter cotton 32 is wrapped on the outside of the mesh 31 and fixed on the mesh 31 by a cable tie. By setting the filter cotton 32, the fluid flowing out of the mesh 31 can be filtered, and the fluid is filtered again, further preventing the water outlet 13 from being blocked. Among them, the cable tie is made of stainless steel, which has the advantages of corrosion resistance and high strength.
[0039] In this embodiment, the inner cylinder 2 further includes a handle 23 disposed on the top plate 22. The handle 23 is located in the middle of the top plate 22, and the handle 23 is provided to facilitate the operator to install and remove the inner cylinder 2.
[0040] Specifically, Figure 1 and Figure 4As shown in the figure, the outer cylinder body 1 includes an outer sleeve 14, a first lifting beam 15, a second lifting beam 16 and a water outlet pipe 17. The first lifting beam 15 and the second lifting beam 16 are respectively arranged on both sides of the outer wall of the outer sleeve 14, and the water outlet pipe 17 is arranged at the bottom of the outer sleeve 14 and communicated with the accommodation cavity. Among them, the connection mode between the water outlet pipe 17 and the outer sleeve 14 is welding. The water outlet pipe 17 has a water outlet 13, and the top of the outer sleeve 14 has an opening 11. Among them, the diameter of the water outlet pipe 17 is 55mm - 59mm, and the length is 75mm - 85mm. The diameter and length of the water outlet pipe 17 can be selected according to actual needs. The diameter of the water outlet pipe 17 can be selected as 55mm, 57mm or 59mm, etc., and the length of the water outlet pipe 17 can be selected as 75mm, 77mm, 79mm, 81mm, 83mm or 85mm, etc. The setting of the first lifting beam 15 and the second lifting beam 16 can facilitate the transportation and handling of the filtration device for nuclear island drainage.
[0041] In this embodiment, the materials of the outer cylinder body 1 and the inner cylinder body 2 are both stainless steel, which have the advantages of corrosion resistance and high strength.
[0042] The operation process and advantages of the filtration device for nuclear island drainage of the present utility model are as follows:
[0043] During the overhaul drainage operation, first place the filtration device for nuclear island drainage at the floor drain. Use a separate hose, tie one end to the water outlet pipe of the outer cylinder body, and insert the other end into the floor drain. Then insert the drainage hose of the system into the communication hole of the top plate. In this solution, up to 8 drainage hoses can be inserted at the same time. The drainage flows to the inner cylinder body 2, passes through the mesh cloth and filter cotton of the inner cylinder body 2 for filtration, enters the accommodation cavity, and finally flows out at the water outlet pipe and is discharged to the floor drain.
[0044] The filtration device for nuclear island drainage of the present utility model effectively solves the problems encountered when multiple drainage hoses are connected to the floor drain, ensures the smooth drainage of the drainage hoses, and avoids water leakage events caused by the plugging and unplugging of the drainage hoses. At the same time, filtration is carried out at the drainage source to prevent dirty water and impurities from entering the wastewater discharge system, reduce the number of filter element replacements of the wastewater filter, and reduce the generation quantity of radioactive waste. If the filtration device for nuclear island drainage is blocked, the blockage can be eliminated by flushing with desalted water, and the filter cotton can be replaced conveniently and quickly; and the present utility model can well solve the problems of nuclear island drainage exhaust and blockage of the pre-filter of wastewater treatment during the shutdown and maintenance period of the unit, ensuring that the overhaul schedule will not be restricted by wastewater treatment and discharge.
[0045] Obviously, the above embodiments of the present utility model are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. A filtering device for nuclear island drainage, characterized in that: include: The outer cylinder (1) has an opening (11), a receiving cavity and a water outlet (13) which are connected in sequence, and the water outlet (13) is used to communicate with a floor drain; The inner cylinder (2) comprises an inner sleeve (21) and a top plate (22) connected to each other, wherein the inner sleeve (21) is inserted into the accommodating cavity from the opening (11), and the top plate (22) is capable of blocking the opening (11). The inner sleeve (21) has a filtering hole (211) communicating with the accommodating cavity, and the top plate (22) has a plurality of communicating holes (221) all communicating with the filtering holes (211), and the communicating holes (221) are used to communicate with a drain hose; A filter assembly (3) is wrapped around the outer wall of the inner sleeve (21) and covers the filter hole (211). The filter assembly (3) is used to filter the fluid flowing from the filter hole (211) to the water outlet (13).
2. The filtering device for nuclear island drainage according to claim 1, characterized in that: The plurality of communication holes (221) are distributed at intervals along the circumference of the inner sleeve (21).
3. The filtering device for nuclear island drainage according to claim 1, characterized in that: The diameter of the connecting hole (221) is 35 mm-45 mm.
4. The filtering device for nuclear island drainage according to claim 1, characterized in that: There are a plurality of filter holes (211), and the plurality of filter holes (211) are distributed at intervals along the circumference of the inner sleeve (21), and the plurality of filter holes (211) are all connected to the accommodating cavity.
5. The filtering device for nuclear island drainage according to claim 1, characterized in that: The filter hole (211) extends along the axial direction of the inner sleeve (21), and the shape of the filter hole (211) is an ellipse or a regular polygon.
6. The filtering device for nuclear island drainage according to claim 1, characterized in that: The filter assembly (3) comprises a mesh cloth (31), and the filtering device for nuclear island hydrophobicity also comprises a pressure plate, the mesh cloth (31) wraps around the outer wall of the inner sleeve (21), the pressure plate is connected to the outer wall of the inner sleeve (21) to fix the mesh cloth (31), and the mesh cloth (31) is used to filter the fluid flowing out of the filter hole (211).
7. The filtering device for nuclear island drainage according to claim 6, characterized in that: The filter assembly (3) also includes filter cotton (32), and the filter device for nuclear island hydrophobicity also includes a cable tie, the filter cotton (32) is wrapped around the outside of the mesh cloth (31) and fixed to the mesh cloth (31) by the cable tie, and the filter cotton (32) is used to filter the fluid flowing out of the mesh cloth (31).
8. The filtering device for nuclear island drainage according to claim 1, characterized in that: The inner cylinder (2) further comprises a handle (23) arranged on the top plate (22).
9. The filtering device for nuclear island drainage according to claim 1, characterized in that: The outer cylinder (1) comprises an outer sleeve (14), a first handle (15), a second handle (16) and a water outlet pipe (17); the first handle (15) and the second handle (16) are respectively arranged on two sides of the outer wall of the outer sleeve (14); the water outlet pipe (17) is arranged at the bottom of the outer sleeve (14) and is connected to the accommodating cavity; the water outlet pipe (17) has the water outlet (13); and the top of the outer sleeve (14) has the opening (11).
10. The filtering device for nuclear island drainage according to claim 1, characterized in that: The outer cylinder (1) and the inner cylinder (2) are both made of stainless steel.